How to use Black & White / Sepia
- Drop your photos
- Choose grayscale, sepia or two-tone, and the strength
- Click Apply and download
About this tool
Grayscale uses perceptual luminance weights (more green, less blue), which matches how bright colors look to the eye. Sepia applies the classic warm brown tone of old prints. Two-tone converts every pixel to pure black or white, which is useful for stamps, stencils and scanned signatures.
Frequently asked questions
What is the difference between grayscale and black and white?
Grayscale keeps all shades of gray. Two-tone (pure black and white) keeps only black and white pixels.
Can I make a PDF grayscale?
Yes, use the Grayscale PDF tool.
Can I do a partial effect?
Lower the strength slider to blend the effect with the original colors.
Are my files uploaded to a server?
No. ConvertBrightly processes files with JavaScript inside your browser. Nothing is sent over the network, and the files disappear when you close the tab. You can even disconnect from the internet after the page loads.
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